BIRDS OF NORTH AND MIDDLE AMERICA 413 



(Santa Marta district, Eio Atrato, Rio Tniando, Calaman) ; Venezuela 

 (Caicara, La Brea, Orinoco Valley) ; all of Brazil (records from 

 Amazonas, Piauhy, Rio de Janeiro, Sao Paulo, Matto Grosso, etc.); 

 the Guianas, eastern Peru (Sarayacu, Santa Cruz); to Bolivia (prov- 

 inces of Chiquitos and Moxos) ; apparently not recorded from Ecuador, 

 although Sarayacu is a rather indefinite locality on the Ecuador-Peru 

 border area. Farther south (Paraguay and northern Argentina) this 

 bird is replaced by a slightly larger but, on the whole, poorly charac- 

 terized form, Busarellus nigricollis leucocephalus Vieillot.' 



Type locality. — Cayenne. 

 Falco nigricollis Latham, Index Orn., i, 1790, 35 (Cayenne; based on Black-necked 

 Falcon Latham, Synopsis, Suppl., p. 30, 100). — Daudin, Traits d'Orn., ii, 

 1800, 111 (Cayenne). — Vieillot, Nouv. Diet. Hist. Nat., xxiii, 1818, 446 

 (Guiana). 

 Buteo nigricollis Vieillot, Nouv. Diet. Hist. Nat., iv, 1816, 473. — Gray, List 

 Spec. Brit. Mus., pt. 1, Accip., ed. 2, 1848, 37 (Brazil); Hand-list, i, 1869, 9, 

 No. 75. — Katjp, in Jardine's Contr. Orn., 1850, 76. — Pucheran, Rev. Mag. 

 Zool., ii, 1850, 85 (crit. on type). — Burmeister, Syst. tlbers. Th. Bras., 

 ii, 1856, 47.— Schlegel, Mus. Pays-Bas, ii, No. 6, livr. 2, 1863, 17 (monogr.); 

 No. 36, livr. 10, 1873, 110.— Lawrence, Mem. Boston Soc. Nat. Hist., 1874, 

 302 (MazatlAn, Sinaloa; habits). — Koenigswald, Journ. fiir Orn., 1896, 383 

 (Sao Paulo, s. Brazil). 

 Morphmis nigricollis Gray, Gen. Birds, iii, App., 1849, 1. 



Buteogallus nigricollis Strickland, Orn. Syn., 1855, 43. — Sclater and Salvin, 

 Ibis, 1859, 216 (Santa Ana Mixtd,n, Guatemala); Proc. Zool. Soc. London, 

 1866, 198 (Saraj'acu, e. Peru); 1873, 302 (Sarayacu and Santa Cruz, e. Peru; 

 habits); Nom. Av. Neotr., 1873, 119 (Guatemala-Brazil); Proc. Zool. Soc. 

 London, 1879, 637 (Peru; Chiquitos and Moxos, Bolivia). — Cassin, Proc. 

 Acad. Nat. Sci. Philadelphia, vol. 12, 1860, 132 (Rio Truando, Colombia).— 

 Sclater, Proc. Zool. Soc. London, 1860, 253 (State of Veracruz, e. Mexico). — 

 Taczanowski, Orn. P6rou, i, 1884, 111. 

 Urubitinga nigricollis Sclater and Salvin, Proc. Zool. Soc. London, 1867, 589 



(Mexiana Island, Brazil). 

 Ichthyoborus nigricollis Pelzeln, Orn. Bras., Abth. 1, 1868, 3; Abth. 4, 1870, 344. — 

 RiDGWAY, Proc. Boston Soc. Nat. Hist., xvi, 1873, 69 (Brazil). — Heine and 

 Reichenow, Nom. Mus. Heine Orn., 1890, 271 (Surinam; Venezuela). 

 Busarellus nigricollis Sharpe, Cat. Birds Brit. Mus., i, 1874, 211 (Brazil; Mexiana 

 Island, Brazil; Demerara, British Guiana); Hand-list, i, 1899, 258. — Ridgway, 

 Bull. U. S. Geol. and Geogr. Surv. Terr., ser 2, No. 2, 1876, 142, part (Brazil; 

 Amazonia; Rio Truando, Colombia; Mazatldn, Sinaloa; monogr.; habits); 

 Proc. U. S. Nat. Mus., v, 1882, 404 (La Palma de Nicoya, Costa Rica; 

 descr. young). — Gurney, Ibis, 1876, 486 (descr. young); List Diurn. Birds 

 Prey, 1884, 78; Cat. Birds Prey, 1894, 25.— Nutting, Proc. U. S. Nat. Mus, 

 V, 1882, 404 (La Palma de Nicoya; habits).— Salvin, Ibis, 1886, 74 (Brit. 

 Guiana). — Zeled6n, Anal. Mus. Nac. Costa Rica, i, 1887, 126 (Las Trojas 

 and Liberia, sw. Costa Rica). — Berlepsch, Journ. fiir Orn., 1889, 317 (Sara- 

 yacu, ne. Ecuador); Nov. Zool., xv, 1908, 293 (Cayenne). — Riker, Auk, 

 viii, 1891, 161 (Santar<5m, Brazil). — Richmond, Proc. U. S. Nat. Mus., xvi, 



' Busarellus nigricollis australis Swann, Synop. Accip., ed. 2, 1922, 95 

 (Morovi (=Mocovi, Chaco), Argentina), auct. —Circus leucocephalus VieiUot. 



